Choose the best answer
Viruses
Bacteria
Plasmodium parasites
Parasitic worms
Industrial pollution
Anopheles mosquitos
Flies
Worms
Fleas
Snails
Draining swamplands
Draining marshes
Spraying breeding areas with DDT
Using drugs to kill parasites in the bloodstream
All of these answers apply
Bacterium
Hazardous chemical
Virus
Parasite
Sexual contact
Mosquitos
Houseflies
Worms
Viruses
Bacteria
Strains of the TB bacterium have developed resistance to antibiotics
Increased population size and the advanced age of the population
Weakened immune systems from the spread of AIDS
The lack of screening and control programs
All of these answers
Lyme Disease
AIDS
Ebola
Influenza
SARS
Requires assessment of technological reliability
Requires careful economic analysis
Requires assessment of human intelligence
Is impossible
Has never been tried before
By global climate change
Primarily by human error
By the northern lights interfering with normal electrical transmissions
Primarily by technological error
By migratory birds
Poverty
Smoking
Cancer
High cholesterol
Driving
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